package cn.tedu.basic;

import java.util.Scanner;

public class Test3_Area {
    public static void main(String[] args) {
       double r = new Scanner(System.in).nextDouble();
       double area = 3.14*r*r;
        System.out.println("圆的面积是：" + area);

        double circumference = 3.14*r*2;
        System.out.println("圆的周长是："+circumference);
    }
}
